Improvement in wagon-jacks



R. W. MARSHALL.- WagonJack.

No. 207,363.- Patented Aug.27, 1878.

WI will UNITED STATES RALPH WV. MARSHALL,

PATENT OFFICE.

OF JOLIET, ILLINOIS.

IMPROVEMENT IN WAGON-JACKS.

Specification forming part of Letters Patent No. 207,363, dated August27, 1878; application filed July 16, 1878.

To all whom it may concern Be it known that I, RALPH IV. MARSHALL, ofthe. city of J oliet, in Will county, State of Illinois, have inventedcertain Improvements in Wagon-Jacks, the description and operation ofwhich I will proceed to explain, reference being had to the annexeddrawings, making a part of this specification, in which- Figure 1 is aside elevation showing the jack open; Fig. 2, a side elevation showingthe jack in operation; Fig. 3, a front elevation; and Fig. 4, a view ofthe adjustable foot.

The nature of my invention consists in the construction of a cheap,durable, and efiective device for lifting vehicles, principally wagonsand carriages, and so constructed as tobe' selflocking and to elevatethe weight in a perpendicular direction.

In the drawings, (t represents the lifting-leg of the jack, which isconstructed by bolting two parallel pieces of wood firmly to the notchedpiece g, thus leaving a slot in either end, the upper slot to receivethe lever c and the lower slot to receive the roller 0, which, movingreadily on the floor or ground, permits the weight to be raisedperpendicularly and also increases the lifting power of the jack.

To the lever 0, near the leg to, is pivoted the fulcrum-leg s by meansof the slotted couplingpiece 6 attached to it by means of bolts andscrews. The peculiar construction and attachment of the couplingpiece eis as follows. The lever a, being pivoted at a point. above aparallelline with thefulcrum-leg s, renders the jack self-locking whenthe lever c is forced down until its lower end rests upon thefulcrum-leg 8, near its foot, as shown in Fig. 2. To the lower end ofthe leg 8 is pivoted an adjustable foot, 01, Fig. 4, which is to preventthe foot from being pushed into the ground. It is selfadjusting alwaysin correct position, however uneven the ground or however much the angleof the leg 8 may change.

The whole device may be constructed of hard wood, except the slottedcoupling-piece e, which is to be of metal.

Fig. 2 shows the jack with the weight raised and the lever locked bybeing brought down until the end strikes and rests upon the top of theleg 8, the axle resting on one of the series of notches g. The roller 0permits the lower end of the lifting-leg s to move forward a littlewhile the lever is being pushed down, so the weight will not be shovedforward, but be lifted in a perpendicular direction. The roller is alsouseful in moving the jack from place to place and in shoving thelifting-leg a into position under the axle.

Havingthus described my invention, what I claim as new, and desire tosecure by Letters Patent, is as follows, to wit:

The combination and arrangement of the parts a and s, lever' 0, slottedcoupling-crotch e, roller 0, and foot a, when arranged to operate in themanner and for the purposes set forth.

RALPH W. MARSHALL. Witnesses THos. H. HUrornNs, J. M. ZIPP.

